与73相邻的两个数是72和74（）

A.61 62 63 64

B.65 66 67 68

C.71 72 73 74

A.71

B.72

C.73

D.74

A.72

B.73

C.74

D.75

A.72

B.73

C.74

D.75

A.72

B.73

C.74

D.75

A.6999　　7000

B.6000　　8000

C.6999　　7001

A.497和498

B.500和501

C.498和500

he is born【71】Human brains differ considerably,【72】being more able than others.【73】no matter how good a brain he has to begin with, an individual will have a low order of intelligence【74】he has opportunities to learn. So the second aspect is what【75】to the individual — the environment in which he is brought【76】. If an individual is handicapped【77】, it is likely that his brain will【78】to develop and he will【79】attain the level of intelligence of which he is【80】.

(76)

A．for

B．by

C．with

D．in

(At the check-in counter.)

A:Excuse me, sir. Should I check in here for Flight UA268 to Chicago？

B:Yes, madam. MayI see your passport and flight ticket, please？

A:Sure, 71 _____________________

B:Very good, Mrs, Chen. 72 _____________________

A:I prefer anaisleseat.

B:OK. Do you have any luggage to check in？

A:Yes. 73_____________________ How much luggage can Icarry on？

B:Only one.

A:Then I need to check in two pieces of luggage.

B:OK. Wouldyou pleaseput them onthe scale？

A:Of course. 74 _____________________

B:No. That’s all. Here is your luggage claim tag, boarding pass,and passport.

A:Excuse me. 75 _____________________

B:At 5:00 p.m. and you will board from Gate 2.

A:Thank you.

B:My pleasure.

选项：

A.Welcometo ABC airline.

B.One suitcase.

C.When is the boarding time？

D.Where are you going to go？

E.Is it overweight？

F.Which seatdo you prefer, a window seat or an aisle seat？

G.here you are.

71____________

72

73

74

75

请帮忙给出每个问题的正确答案和分析，谢谢！

A.81和82

B.79和81

C.78和79